Hello,
I just created a folder in the photo section called 'Henrik Olsson' and
placed a photo of the first CNC machine I made. It worked OK for drilling
PCB and very light engraving in plastics. But to route/cut/mill ANY metall
with this machine is way out of its league. I used ACME threads and NEMA23
motors with homebuildt drives (schematic and bordlayout free, just ask). But
due to the flimsy drawerslides it vibrated BADLY at some speeds. For a
drilling only machine I can recomend drawerslides of the beefier kind.
/Henrik Olsson.
Sweden.
----- Original Message -----
From: "Dave Mucha" <dave_mucha@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, October 08, 2003 9:08 PM
Subject: [Homebrew_PCBs] Re: HomeBrew CNC machine motors
> (what stands NEMA for?)
>
> National Electrical Manufacturers Association
>
>
> > Can these motors drive the threaded rods direct?
>
> YES
>
>
>
> The nice thing about having a standard for motors, NEMA23 or
> otherwise is that you can get a larger, more powerful motor and it
> will fit in directly.
>
> as a kinda-sorta general rule of thumb, a round body NEMA23 motor
> that is roughly 2.3 inches long is a SINGLE STACK and has about 50-
> oz in toruque.
>
> a unit that is about 5 inches long and round body is about 100 in-oz
> torque.
>
> The newer motors have a more square body, not round and are often
> much higher tourque.
>
>
> And look on the net for drivers.
>
> the linistepper seems a board that fits our group nicely.
> also, check the Allegro A3977 chip. very simple.
>
> Dave
>
>
>
>
>
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